A handy lookup table of similar technology and services to help ex-googlers survive the real world :) pull-requests very welcomed. Please do not list any confidential projects!

For a working example of (some) of these technologies integrated together, see: https://github.com/google/startup-os

See also: System Design Primer, The Hadoop Ecosystem Table, Map AWS services to GCP products

Technology

Core Technology

Google Internal	Google External	Open Source / Real-World
MapReduce		Apache Hadoop, Spark
Protocol Buffer	Protobuf	Cap'n Proto, Thrift, Avro, Amazon Ion
Stubby	gRPC	Thrift, Bolt
Chubby		Apache Zookeeper, etcd, HashiCorp Consul
?		Apache Kafka, Apache Pulsar, Facebook LogDevice

Infrastructure

Google Internal	Google External	Open Source / Real-World
Borg		Kubernetes, Apache Mesos, HashiCorp Nomad
GSLB, GFE, Maglev		ELB, HAProxy, Istio, F5, envoy
data center hardware	open compute
Jupiter, Starblaze
B4, Stargate, TE
USPS, Andromeda

Storage

Google Internal	Google External	Open Source / Real-World
GFS/Colossus		HDFS, Ceph, GlusterFS
BigTable	Cloud BigTable	PrestoDB, Cassandra, HBase, Accumulo, DynamoDB
Spanner	Cloud Spanner	Vitess, CockroachDB, TiDB
ColumnIO / Capacitor		Apache Parquet
sstable	levelDB	RocksDB
zippy	Snappy	lz4

Services

Google Internal	Google External	Open Source	SaaS
Dremel	BigQuery	Apache Drill, Presto, Spark(sort-of),	AWS Athena, Redshift Spectrum
Dremel UI		Redash, Metabase, Apache Superset
Search (Mustang, Alexandria)		Elasticsearch, Solr, Lucene	algolia
pubsub	pubsub	NATS.io, RabbitMQ, PubNub	AWS SQS/SNS, AWS AppSync
Flume (Java)	Apache Beam	Apache Crunch
MillWheel	Cloud Dataflow	Apache Flink

DevOps

Google Internal	Google External	Real-World
Assimilator		Dominator
Blaze	Bazel	Buck, Pants, please.build, Blade, recc
Oncall		PagerDuty, OpsGenie, VictorOps
varz/borgmon/monarch		Datadog, Prometheus, librato, newrelic, skylight, scout, Scotty/tricorder, also this and this
Exception/Error Tracking (??)		Sentry.io, Raygun.io, Rollbar, Honeybadger, Airbrake, OverOps
styleguides	google styleguides	PEP-8, HoundCI auto-style-reviewer
Blaze/Forge/TAP/BuildCop	Cloud Build	buildkite, CircleCI, travis, jenkins, gitlabCI
Sandman(test env)/Guitar
Sisyphus / Rapid		Spinnaker, lambdaCD, screwdriver.cd, CodeShip, shipit-engine, GoCD, AWS CodeDeploy, Capistrano, Fabric, ConcourseCI
borg / borgcfg / gcl		AWS Cloudformation, Puppet, Chef, Salt, Ansible, Terraform, Jsonnet, kubecfg
logging	StackDriver	logstash, fluentd, papertrail, cernan
CodeSearch	Zoekt	Sourcegraph, OpenGrok
Critique, Gerrit, Mondrian etc.	Gerrit	Reviewable
cider		Eclipse Che, Cloud9, gitpod.io
buganizer		JIRA, bugzilla, github issues
ToTT	Google Test Blog
Copybara	Copybara

Security

Google Internal	Google External	Open Source
prodaccess/LOAS		Keymaster
prod secrets/identity management		chamber, knox, SPIFFE

IT / Operations

Google Internal	Real-World
software engineering at google
valentine	1Password, Lastpass, pass
OWNERS files in repo	github CODEOWNERS
snippets	Khan/snippets
memegen	memegen
edge, people ops training	LifeLabs
googlegeist	Culture Amp, humu
stuff (SaaS IT management)	intello, zylo
stuff (Device Management)	Fleetsmith, jamf, rippling IT
device security monitoring	Red Canary
go/ links	golinks, go, Goat

also check out xoogler.co, which organizes events, slack channels etc

disclaimer: I'm not affiliated with any of the technologies mentioned above.

disclaimer: I left Google a number of years ago so some of the naming might be dated